/**
 * blocked.hpp - 
 * @author: Jonathan Beard
 * @version: Sun Jun 29 14:06:10 2014
 * 
 * Copyright 2014 Jonathan Beard
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef _BLOCKED_HPP_
#define _BLOCKED_HPP_  1
#include <cstdint>

union Blocked
{
   
   Blocked() : all( 0 )
   {}

   Blocked( volatile Blocked &other )
   {
      count    = other.count;
      blocked  = other.blocked;
   }

   Blocked& operator += ( const Blocked &rhs )
   {
      if( ! rhs.blocked )
      {
         (this)->count += rhs.count;
      }
      return( *this );
   }
   
   struct
   {
      std::uint32_t blocked;
      std::uint32_t count;
   };
   std::uint64_t all;
}
#if __APPLE__ || __linux
__attribute__ ((aligned( 8 )))
#endif
;

#endif /* END _BLOCKED_HPP_ */
